Apparatus for removing water from paper-drying cylinders.



No. 784.821. PATENTED MAR. 14, 1905.

J. WHITE. APPARATUS FOR. REMOVING WATER PROM PAPER DRYING G YLINDERS.

APPLICATION FILED DBO. 27, 1904.

2 SHEETS-SHEET 1.

PATENTED MAR. 14, 1905.

J. WHITE. APPARATUS FOR REMOVING WATER FROM PAPER DRYING GY LINDERS.

APPLICATION FILED DEC. 27. 1904.

2 SHEETSSEHELT 2;.

UNITED STATES .4; Patented March 14, 1905.

PATENT OFFICE.

.JOHN WHITE, OF EDINBURGH, SCOTLAND.

SPECIFICATION forming part of Letters Patent No. 784,821, dated March 14, 1905.

Application filed December 27, 1904- Serial No. 238,475.

To ail whom it may concern.-

Be it known that I, JOHN WHITE, a subject of the King of the United Kingdom of Great Britain and Ireland, residing at Edinburgh, Scotland, have invented certain new and useful Improvements Applicable to Apparatus for Removing Water from the Drying-Cylinders of Paper-Making Machines, of which the following is a specification.

This invention relates to apparatus for removing water from the drying-cylinders of paper-making machines; and it has for its object to provide a steam connection for-dryingcylinders in which the steam-space in the cylinder is shut off from the exhaust or discharge pipe during the time that a water-lifter is traveling through the lower half of its path, which connection is opened to the exhaust or discharge pipe'during the time that the waterlifter is traveling through the upper half of its pathviz., when discharging water.

In the accompanying drawings, which illustrate the invention, Figure 1 is a longitudinal vertical section of part of a drying-cylinder fitted with a water-lifter. Fig. 2 is a longitudinal vertical sectionfto a larger scale, of part of the apparatus toward the discharge end. Fig. 3 is a cross-section as at the line 2 2 of Fig. .2; and Fig. L is a sectional end elevation, to a smaller scale, illustrating the operation of the discharge-valve. Fig. 5 is a detail view, to enlarged scale, showing the waterlifter.

As shown, A represents the drying-cylinder, provided with the usual steam-inlet pipe B and fitted with a perforated tube C, having a radial vane and constituting the water-lifter, which discharges through the pipe D into an annular space E, formed around the steaminlet pipe B, by the end gudgeon F of the cylinder, as set outin the specification of British Letters Patent No 3,120 of 1903. A tubular end piece G is fitted around the steam-inlet pipe B and secured to theend of the cylinder gudgeon or trunnion F, so as to revolve therewith, thesteam-pipe B being preferably screwed into said end piece G, while extending inward through the trunnion F and through the pipe-bend D, bolted to the interior end of the cylinder.

An exhaust-pipe connection H, to which is attached an exhaust-pipe H, is fitted over and closely jointed to the outside of the tubular end piece Ur, and to this connection H the steam-supply pipe B is secured, so as to direct the live steam centrally toward the steam-pipe B. An exhaust-port I is formed in the tubular end piece Gr, extending about half-way round its circumference outside the steampipe, as indicated at Fig. 3, and communicates with the exhaust-pipe H H while the waterlifter G is traveling through the upper half of its path, thus permitting the water to run into the exhaust-pipe during such half-revolution; but when the water-lifter is traveling through the lower half of its path a solid face at I" on the end piece G closes the outlet h to the exhaust-pipe, so that the steam cannot escape. A gland J, of ordinary construction made in halves, is securedaround the end piece Gr and fitted with bolts K and springs L to keep the faces of the end piece G and the steam and exhaust connection H in close contact.

For the purpose of discharging the collecting water from the exhaust-pipe H without lossof steam a discharge-valve arrangement is provided and operated from the rotation of the cylinder, as indicated at Fig. 4.

The discharge-pipe H is connected to an exhaust-pipe NI discharging into a valve box or chamber N, having an outlet 0, normally closed by a disk or other valve P.

The valve I is connected by a valve-rod P, chain P and adjustingscrew P or like means providing for adjustment to one end of a beam-lever Q, whose opposite end is acted on by a cam or kicker R on the trunnion end of the revolving cylinder A. The arrangement is such that when the water-lifter G within the cylinder A is traveling through the upper half of its path the communication between the inside of the cylinder and exhaust-pipe H H is open to discharge water into the valve-box N, during which time the valve P remains closed; but when the waterlifter O is traveling through the lower half of its path the cam striking against the beamlever Q lifts the valve 1 to allow escape of the water in the valve-box N. The communication between the inside of the cylinder A and the exhaust-pipe H H being then closed, little or no steam escapes with the dischargewater.

The extent of lift of the valve may be adjusted to suit the volume of water discharged.

Having now described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. The combination with a paper-drying cylinder, of a water-lifter rotating with said cylinder and discharging through the end gudgeon of said cylinder, a tubular end piece secured on said gudgeon, a steam-inlet pipe, and an exhaust-pipe connection fitted to said end piece, said end piece having an automatically opening and closing exhaust-port providing communication between the water-lifter and the exhaust connection when the water-lifter is in position to discharge water, substantially as described.

2. The combination with a paper-drying cylinder, of a steam-pipe admitting steam to said cylinder, a perforated tube having a radial vane and serving as a water-lifter, a pipe connecting said tube to the end gudgeon of said cylinder, a tubular end piece secured to said gudgeon, an exhaust-pipe connection litted to said end piece, said end piece having an exhaust-port extending about halfway round its circumference outside the steam-pipe so as to communicate with the exhaust connection while the water-lifter is traveling through the upper part of its path, substantially as described.

o. The combination with a paper-drying cylinder, of a water-lifter rotating with said cylinder, and discharging through the end gudgeon of said cylinder, a tubular end piece secured on said end gudgeon, a steam-inlet pipe supplying steam to said cylinder, an exhaust-pipe connection fitted to said end piece, said end piece having an exhaust-port provid ing communication between the water-lifter and the exhaust-pipe connection when the water-lifter is in position to discharge water a steam-supply pipe secured to said connection a gland made in halves secured around the end piece, and bolts and springs serving to keep the faces of the end piece and of the exhaust connection in close contact, substantially as described.

4. The combination with a paper-drying cylinder, of a water-lifter rotating with said cylinder and adapted to periodically discharge water, an exhaust-pipe connected to said cylinder, a valve-box connected to the exhaustpipe, a valve in said box, and means for operating said valve from the rotating cylinder, substantially as described.

5. The combination with a paper-drying cylinder, of a water-lifter rotating with said cylinder and adapted to periodically discharge water, an exhaust-pipe connected to said cylinder, a valve-box connected to the exhaustpipe, a valve in said box, a beam-lever, a connection between said valve and said lever, and a cam on the trunnion end of the rotating cylinder serving to lift said valve to allow escape of water in the valve-box.

6. The combination with a paper-drying cylinder, of a water-lifter rotating with said cylinder and discharging Water through the end gudgeon of said cylinder, a tubular end piece secured on said gudgeon, a steam-supply pipc fitted to said end piece, said gudgeon having an exhaust-port providing communication between the water-lifter and the exhaust connection when the water-lifter is in a position to discharge water, a valve-box connected to the exhaust-pipe, a valve in said box, a beam-lever, a connection between said valve and said lever, and a cam on the trunnion end of said rotating cylinder serving to lift said valve, substantially as described.

7. The combination with a paper-drying cylinder, A, of a perforated tube C serving as a water-lifter, the pipe 1) connecting said tube C to the end gudgeon of said cylinder, the tubular end piece G secured on said gudgeon, the steam-inlet pipe B screwed into said end piece, the exhaust-pipe and connection H, H fitted to said end piece G, said end piece having an exhaust-port I providing communication between the water-lifter and the exhaust-pipe, the steam-supply pipe B, the valve-box N connected to the exhaust-pipe and having an outlet 0, a valve P in said box, a beam-lever Q, a valve-rod P, chain P and adjusting-screw P connecting said valve with said lever and a cam R on the trunnion end of the rotating.cylinder, as and for the purpose set forth.

In testimony whereof .I have signed my name to this s1 )ecilication in the presence of two so 1)- seribing witnesses.

JOHN \VHlTlE. lVitnesses:

\ V ALLA o u FAImvnA'rnuR, JNo. Anius'rnoNe, Junr.

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